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X-ray diffractometry investigation for ion-exchange properties on alpha-type manganese dioxides

Published online by Cambridge University Press:  31 January 2011

Yasuo Tanaka
Yasuo Tanaka
Affiliation:
Seawater Science Research Laboratory, Japan Tobacco Inc., 4–13–20 Sakawa, Odawara, Kanagawa 256, Japan
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Abstract

Two materials of α-type manganese dioxide were synthesized and examined. They were prepared by the pyrolysis of mixtures of MnCO3 and (CH3)3COK. An ill-ordered material was obtained when prepared at large (CH3)3COK content. Both samples behave as acids, but their apparent capacities are obviously different: about 0.9 meq/g for a well-ordered sample and about 2.6 meq/g for an ill-ordered sample. Ion-exchange properties were examined on Kielland's plot. Zero intersections of the two samples are almost the same but slopes are different (about −50 for a well-ordered sample and about −10 for an ill-ordered sample). The difference in slope is likely caused by the flexibility. An evidence of the flexibility can be seen by x-ray diffractometry.

Type
Articles
Information
Journal of Materials Research , Volume 11 , Issue 4 , April 1996 , pp. 1030 - 1036
Copyright
Copyright © Materials Research Society 1996

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